Slow down processing of blocks to avoid CPU/memory issues.
Add deactivated and suspended states.
CreatedAt modulus on both user and actions led to some actions never executed.
Chain block calls so they're not sent all at once.
Log pending connection count.
Put logs on /data partition.
Query by Actions rather than by users.
Improve logging and add deferred-suspended
Process actions for up to 40 users at a time.
Don't update blocks every time a user blocks or unblocks.

This was creating very high load when processing large block lists.
Improve logging in actions.js
Don't save users that haven't changed.
Add an index on screen name of TwitterUsers.
Fix screenname index to actually index screenname.
Allow more users per blocks-processing chunk.
BtUsers and Actions: add columns and an index.
Actions on suspended users go into deferred state.
Increase actions.js interval
Implement deferred-source-deactivated Actions.
Add index on createdAt for TwitterUsers.